Full distribution of clusters with universal couplings and in-medium effects

Abstract

Light and heavy clusters are calculated for asymmetric warm nuclear matter in a relativistic mean-field approach. In-medium effects, introduced via a universal cluster-meson coupling, and a binding energy shift contribution, calculated in a Thomas-Fermi approximation, were taken into account. This work considers, besides the standard lightest bound clusters ${}^4$He, ${}^3$He, ${}^3$H, and ${}^2$H, also stable and unstable clusters with higher number of nucleons, in the range $5\le A\le 12$, as it is natural that heavier clusters also form in core-collapse supernova matter, before the pasta phases set in. We show that these extra degrees of freedom contribute with non-negligible mass fractions to the composition of nuclear matter, and may prevail over deuterons and $\alpha$ particles at high density in strongly asymmetric matter, and not too high temperatures. The presence of the light clusters reduces the contribution of heavy clusters to a much smaller density range, and to a smaller mass fraction.

17 pages, 14 figures, accepted for publication in PRC

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Cited by in corpus (13)

• Light $p$-shell nuclei with cluster structures ($4\le A\le 16$) in nuclear matter
• Embedding short-range correlations in relativistic density functionals through quasi-deuterons
• Experimental study of the isospin transport with 40,48 Ca+ 40,48 Ca reactions at 35 MeV/nucleon
• Improved method for the experimental determination of in-medium effects from heavy-ion collisions
• Bose-Einstein condensate of alpha particles in the ground state of nuclear matter?
• Employing ternary fission of ${}^{242}$Pu as a probe of very neutron rich matter
• Influence of the tetraneutron on the EoS under core-collapse supernovae and heavy-ion collisions conditions
• Dynamics of dilute nuclear matter with light clusters and in-medium effects
• Light clusters as a possible source of crustal impurities: a quasi-particle approach
• Phase-space excluded-volume approach for light clusters in nuclear medium
• Light hyperclusters and hyperons in low-density hot stellar matter
• Heavy baryons in hot stellar matter with light nuclei and hypernuclei
• Medium effects on light clusters from heavy-ion collisions within a relativistic mean-field description